Joined: 21 Feb 2006
Affiliation: McGill University
|Posted: November 13 2006
I used WMAP3+SDSS data (May 2006 CosmoMC) with a modified scalar power spectrum. When I included the nonlinear effect in the matter power spectrum, nonlinear_pk = T, the chains would run into regimes which give:
mpk chi-sq: -Infinity
Does anyone know what is wrong?
I tried to output the matter power spectrum, and found it is of order 10−20. However, when I turned off the nonlinear option, nonlinear_pk = F, the magnitude of the matter power spectrum is of order 104, so I guess the code for the nonlinear effect breaks down for some models?
12 Nov 2006